China built the largest air purifier tower in the world

China built an air purifier tower higher than 91 meters in Xi'an City, Shaanxi Province, to deal with the problem of heavy air pollution. The operator of the giant filter tower declared it to be "the world's largest air purifier tower," the International Business Times reported yesterday.

In the winter, people in Xian City suffered from serious pollution, as the city's heating system depended heavily on coal. Researchers at the Earth Environment Institute at the Chinese Academy of Sciences are testing air purifiers. More than a dozen pollution monitoring stations have been set up to test the effectiveness of the filtering tower in Xi'an.

Design air purifier in Xi'an, Shaanxi. (Photo: SCMP).

The team reports that the massive air purifier tower produces more than 10 million cubic meters of clean air per day. According to Cao Junji, the lead scientist of the project, air quality has been improved in an area of ​​10km2. "The filter tower has no peer-to-peer version of the dimensions. The test results are quite satisfactory," Cao said.

Cao also shared that the filter tower successfully reduced the haze to an average for many days when air pollution was extremely high. The base of the tower covers half the football field, including many greenhouses. These greenhouses suck polluted air, then heat it up with solar energy. Hot air rises and passes through many layers of filter before going through the tower.

According to Cao, the filter tower uses very little electricity, mainly powered by solar energy. "It hardly requires any power during the day. The design works very well while running the test," the researcher said.

Xi'an air filter tower is a miniature version of the larger haze filter tower that Chinese scientists plan to build in other cities around the country in the future. As described in the team's patent application in 2014, the standard haze filter tower will be taller than 488 meters and have a diameter of 198 meters.